Trek Supercaliber SLR 9.9 XX Flight Attendant Gen 2

Trek Supercaliber SLR 9.9 XX Flight Attendant Gen 2 Overview

The Trek Supercaliber SLR 9.9 XX Flight Attendant Gen 2 is a carbon cross-country mountain bike with an SLR OCLV Mountain Carbon frame, IsoStrut suspension, and a RockShox Flight Attendant suspension system. The frame uses 80mm of rear travel with a Trek IsoStrut and RockShox SIDLuxe Flight Attendant RL3 damper, paired with a 110mm RockShox SID SL Ultimate fork.

This build uses SRAM XX SL Eagle AXS T-Type wireless shifting with a 10-52T SRAM Eagle XS-1299 cassette and SRAM XX Eagle T-Type 12-speed chain. The SRAM XX SL Flight Attendant crankset uses a 34T alloy chainring and DUB Wide setup, with crank length matched by size.

The wheel package centers on Bontrager Kovee RSL OCLV Mountain Carbon 29-inch wheels with Tubeless Ready construction and CenterLock hubs. Braking is handled by SRAM Motive Ultimate 4-piston hydraulic disc brakes with SRAM CenterLine X CenterLock rotors. Finishing parts include an Aeolus RSL saddle with carbon rails, Fox Transfer SL internal dropper seatpost, Bontrager RSL integrated OCLV Carbon handlebar/stem, and ESI Chunky grips.

Key Features of Trek Supercaliber SLR 9.9 XX Flight Attendant Gen 2

• SLR OCLV Mountain Carbon frame with IsoStrut gives the bike a dedicated carbon cross-country platform with 80mm of rear travel.
• RockShox SID SL Ultimate fork uses Flight Attendant Race Day damping and 110mm travel for electronically managed front suspension.
• Trek IsoStrut with RockShox SIDLuxe Flight Attendant RL3 damper gives the rear suspension a compact, frame-integrated layout.
• SRAM XX SL Eagle AXS T-Type drivetrain delivers wireless 12-speed shifting with a wide-range 10-52T cassette.
• Bontrager Kovee RSL OCLV Mountain Carbon wheels add a carbon 29-inch Tubeless Ready wheel package.
• SRAM Motive Ultimate 4-piston hydraulic disc brakes provide hydraulic braking control with SRAM CenterLine X CenterLock rotors.
• Fox Transfer SL internal dropper seatpost gives size-specific travel from 100mm to 150mm.
• Bontrager RSL integrated OCLV Carbon handlebar/stem keeps the cockpit clean with size-specific stem lengths.

Ride Use

This bike fits the cross-country mountain bike category, with a carbon frame, 29-inch carbon wheels, 80mm rear travel, and a 110mm RockShox SID SL Ultimate fork. The SRAM XX SL Eagle AXS T-Type drivetrain, 10-52T cassette, and tubeless-ready wheel setup support cross-country riding where efficient pedaling, low bike weight, and precise component function matter.

Why Choose This Bike

Choose this bike for a carbon cross-country build centered on Trek’s SLR OCLV Mountain Carbon Supercaliber frame, IsoStrut suspension, RockShox Flight Attendant components, and SRAM XX SL Eagle AXS T-Type wireless shifting. The build is completed with Bontrager Kovee RSL carbon 29-inch wheels, SRAM Motive Ultimate 4-piston hydraulic disc brakes, a Fox Transfer SL dropper seatpost, and an integrated Bontrager RSL OCLV Carbon cockpit. It comes in Navy Smoke, Carbon Smoke, and Red Smoke, with a stated weight of 10.28 kg / 22.67 lbs for size M with TLR sealant and no tubes.